If your Huawei MateBook X Pro's touchpad is loose and rattles when you tap on it, try sticking a piece of paper between the touchpad and the frame. You might not need to remove the battery like I did, but if you do, the heatsink plate has to come off first, which is a hassle. You do NOT need to take out the touchpad itself to perform this mod.
Some clarifications about the video:
- The ID card is to support the touchpad from underneath, or else you'd just be hammering the chassis.
- You can also try putting something about the thickness of printer paper under the tabs, if you're not comfortable with hammering.